Specifications

DOCSIS 1.1 for Cisco uBR905 and Cisco uBR925 Cable Access Routers and Cisco CVA122 Cable Voice Adapters
How to Configure DOCSIS 1.1 Support
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Cisco IOS Release 12.2(15)CZ
• Software Upgrade Filename (Option 9)—Specifies the full filename and path for the software image
on the TFTP server. To support a secure software download, you must specify a software image that
has been digitally signed (includes “cvc” as part of the filename).
• TFTP Server IP (Option 21)—IP address of the TFTP server that will provide the new software
image.
• Manufacturer CVC (Option 32)—Specifies the code verification certificate (CVC) that
Cisco Systems used to digitally sign the Cisco IOS software image. The router uses this CVC to
verify the software image that is downloaded using DOCSIS secure software download.
You can create this file using any DOCSIS 1.1 configuration file editor, such as the Cisco DOCSIS
Configurator Tool (release 3.7). For example, Figure 6 shows an example that specifies the image
ubr925cvc-k9o3sv9y5-mz in the directory /CiscoSystems on the TFTP server at IP address
192.168.100.13. (See Figure 5 on page 26 for an example of Cisco Broadband Configurator version 4.0.)
Figure 6 Software Upgrade Parameters
If you are creating an ASCII configuration file and using the DOCSIS Configurator tool to convert it into
the binary DOCSIS configuration file, you would enter these same values as follows:
09 (Software Upgrade Filename) = /CiscoSystems/ubr925cvc-k9o3sv9y5-mz
21 (TFTP Server IP) = 192.168.100.13
Step 3 Configure the DOCSIS 1.1 configuration file with the other parameters appropriate for your network and
for this router. In particular, you should enable BPI+ operation.